At the end of a momentous year, JOHN KAMPFNER surveys the febrile European political scene and finds embattled leaders, emboldened populists and a looming election in which everything could be up for grabs.

The notorious MS-13 is one of the most brutal criminal gangs in the world. But, says STEVEN S DUDLEY, who has spent three years studying it, the group is being used to push a specific agenda by the Trump administration - and that won't help address the real problem